const http = require("http");
try {
    http.createServer((req,res)=>{
        var str ="hello world";
        res.end(str);
    }).listen(8081);
    // var test = "server is listening 8081";
    console.log(test);
} catch (error) {
    console.log(error.message);
    console.log(error.constructor.name);
    
}
